I'm not sure I agree. What I see more and more of is groups of white people fighting cops or other groups of white people. The big BLM protests still happen, but many cities
also have smaller but much more confrontational groups of protesters - and I think that does create backlash. There are people who are using the big BLM protests as a sort of cover to .... well, I don't even know what these smaller groups are hoping to accomplish. But they seem focused on fighting and burning.
Denver officials denounce “anarchists” who damaged property, set fires during anti-police demonstration
Here's a twitter thread of that event.
https://twitter.com/MarcSallinger/status/1297396960949702656
This was not a BLM protest, the city and police went to great effort to communicate that they understood this fight to be different from the actual BLM protest that also happened that same night.
But when things like this happen over and over again, people who support police reform
also start to wonder what the police can do to deal with the small but very destructive bands of anarchist nihilists who seem to be using the BLM protests as an excuse and as cover to break things and fight and start fires. People may start to doubt or worry about efforts to dramatically restructure policing in America when they see people burning car dealships, fast food joints, landscaping trees, gas stations and just about anything else seemingly just as an excuse to fight with cops or militia (not to mention that the militia also live for this sort of confrontation, they love it when the anarchists set fires as that just reinforces the message that the militia are sending).
Lately it seems more and more like we've got two left-side movements going on right now - the BLM movement that wants genuine police reform, and the anarchist "movement" that wants no policing. We conflate them at our own risk. And the right-side militia loves, loves, loves the anarchist movement as that is just what they need to justify their own confrontationality, and serves as the perfect bogeyman to frighten people with.